California home sales increased 4.7 percent in November compared with the same period a year ago, while the median price of an existing home rose 5.8 percent, according to a C.A.R. report released yesterday.  The median price of an existing, single-family detached home in California during November 2009 was $304,520, a 5.8 percent increase from the revised $287,880 median for November 2008, C.A.R. reported.  The November 2009 median price rose 2.4 percent compared with October’s $297,500 median price.  The median home price in California has risen nine consecutive months in month-to-month comparisons, but November marked the first time California’s median home price has risen in year-to-year comparisons since August 2007.